The invention provides an automatic checking method and system for transformer substation project clearance distance compliance. The method includes: converting three-dimensional design checking specifications of transformer substation projects into expression modes of limited languages; Analyzing the expression mode of the restricted language by utilizing a natural language processing technologyto obtain an analysis result, and converting the analysis result into a domain feature language of the power grid domain by combining with a power grid domain ontology; Corresponding the vocabulariesof the restricted language to the concepts of the power grid domain ontology to obtain a corresponding relation, and automatically generating a DSL rule based on the corresponding relation; And according to the DSL rule, performing query in a GIM model database of the transformer substation engineering to obtain a compliance examination result of the clearance distance. The compliance automatic audit of the clearance distance of the transformer substation project is realized, and the audit speed and quality are effectively improved.